219. Electrical and hydraulic systems associated with door control are included as appropriate

A. Apply a layer of solvent on the top access panel

B. Apply a layer of sealant on the top access panel

C. Apply a layer of sealant on the bottom access panel

A. 用于密封油箱的所有材料对所有燃油和燃油稳定剂都耐用。

B. 用于密封油箱的所有材料对所有燃油和燃油添加剂者耐用。

C. 用于密封油箱的所有材料对所有燃油和燃油添加剂都防水。

A. Before you can apply it, you must make a paste. To do this, mix the powder with pure water or spirit.

B. Before you can apply it, you must make a paste. To do this, mix the powder with pure water or white spirit.

C. Before you can apply it, you must make a paste. To do this, mix the powder with pure water or ethyl alcohol.

A. 英语是科学、工艺和人际关系的交流语言。

B. 英语是科学、技术和相关人员的互通语言。

C. 英语是科学、技术和人际关系的国际语言。

A. 在释压测试期间不得开启舱门。

B. 在增压测式期间,确保舱门关闭。

C. 进行水压测试时,确保舱门关闭。

A. Water above the kitchen floor can seep in through small holes in the floor surface, invisible to the naked eye.

B. Eyes cannot see the vapor which may penetrate through small holes of the floor surface in the galley.

C. Moisture above the galley floor can go through small holes in the floor surface area and stay out of view

A. Do not jar the instruments

B. Do not pivot the instruments

C. Do not shake the instruments

A. 用于照亮桨叶的操作或显示的部分,包括灯、电门等。

B. 用于指示螺旋桨系统的操作或激活的部分。包括灯、电门等。

C. 用于指示桨叶的操作或显示的部分,包括灯、电门等。

A. If a single power source serves more than three systems, it will be discussed in one of the three systems.

B. If a single power source serves two or more systems, it needs to be discussed under either one system under appropriate chapter heading.

C. If a single power source serves two or more systems, each system should discuss it under appropriate chapter heading.

A. 复合板材使搭接处更坚固。

B. 加强板使搭接接头更坚固。

C. 经过再次强化的板材使塔接凸缘承力更强。